aakk9999 - 3:09 pm on Aug 24, 2013 (gmt 0)
Meta keywords have no impact on ranking in Google whatsoever.
I have never heard of | as a separator though.
Usually it is comma (hard separator) or just leave spaces as separator. There is a post from tedster in this thread (from 2005!) discussing a difference between comma and spaces as a separator [webmasterworld.com...]
But as I said, I would not bother, Google said they have not been using them for a long time.